Local magnetic structure at the Fe3O4/ZnO interface
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Date
2012-02-01
Journal Title
Journal ISSN
Volume Title
Publisher
Australian Institute of Physics
Abstract
Magnetite, Fe3O4, is a half-metal with 100% spin polarization of the minority band at the Fermi level. This together with its good conductivity match to standard semiconductors makes it a promising candidate for polarized spin injection into semiconductor materials such as Si, GaAs, or ZnO [1]. An important aspect for such applications is the magnetism directly at the interface between Fe3O4 and the semiconductor. Soft x-ray resonant magnetic reflectometry is a technique which is capable of providing structural and magnetic depth profiles with 0.1nm resolution. We present a detailed XRMR and electron energy loss spectroscopy (STEM/EELS) study of an epitaxial Fe3O4 thin film grown directly on a semiconducting ZnO substrate [2]. Consistent chemical profiles at the interface between ZnO and Fe3O4 are found from XRMR and EELS. The magnetic depth profile of tetragonal Fe3+ and octahedral Fe2+ ions in Fe3O4 is derived with monolayer resolution and reveals a change in the Fe stoichiometry directly at the interface.
Description
Keywords
Magnetite, Iron, Spin, Fermi level, Polarization, Semiconductor materials, Magnetism, Magnetic resonance, Stoichiometry
Citation
Brück, S., Paul, M., Tian., Müller, A., Fauth, K., Goering. E., Verbeeck, J., Van Tendeloo, G., Sing, M., & Claassen, R. (2012). Local magnetic structure at the Fe3O4/ZnO interface. Poster presented to the 36th Annual Condensed Matter and Materials Meeting, Wagga 2012, Charles Sturt University, Wagga Wagga, NSW, 31st January – 3rd February, 2012, (pp. 68). Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2012/